252 citations · 2.5k across the 57 of their papers we have counts for
6 papers · 1 filter
On the origin of white dwarfs with carbon-dominated atmospheres: the case of H1504+65
L. G. Althaus, A. H. Córsico, S. Torres +1
We explore different evolutionary scenarios to explain the helium deficiency observed in H1504+65, the most massive known PG1159 star. We concentrate mainly on the possibility that…
Revisiting the theoretical DBV (V777 Her) instability strip: the MLT theory of convection
A. H. Córsico, L. G. Althaus, M. M. Miller Bertolami +1
We reexamine the theoretical instability domain of pulsating DB white dwarfs (DBV or V777 Her variables). We performed an extensive -mode nonadiabatic pulsation analysis of DB e…
Evidence of thin helium envelopes in PG1159 stars
L. G. Althaus, A. H. Córsico, M. M. Miller Bertolami +2
We present evidence that PG1159 stars could harbour He--rich envelopes substantially thinner than those predicted by current evolutionary models with current estimates of mass loss…
The age and colors of massive white dwarf stars
L. G. Althaus, E. García-Berro, J. Isern +2
We present evolutionary calculations and colors for massive white dwarfs with oxygen-neon cores for masses between 1.06 and 1.28 Mo. The evolutionary stages computed cover the lumi…
Mass-radius relations for massive white dwarf stars
L. G. Althaus, E. García--Berro, J. Isern +1
We present detailed theoretical mass-radius relations for massive white dwarf stars with oxygen-neon cores. This work is motivated by recent observational evidence about the existe…
The formation of DA white dwarfs with thin hydrogen envelopes
L. G. Althaus, M. M. Miller Bertolami, A. H. Córsico +2
We study the formation and evolution of DA white dwarfs, the progenitors of which have experienced a late thermal pulse (LTP) shortly after the departure from the thermally pulsing…